Owners can pay the tax by mail if postmarked no later than Oct. 31. Taxpayers should include the tax statement and write the property tax account number on checks or money orders. Send them to King County Treasury, 500 Fourth Ave., Room 600, Seattle, WA, 98104.

Taxpayers can pay in person at the King County Administration Building, 500 Fourth Ave., Room 600, in Seattle, Monday through Friday from 8:30 a.m. to 4:30 p.m. On Oct. 31, treasury operations will be open until 5 p.m.

An owner can also pay in person at a King County Community Service Center, if paid by check for the exact amount due. Issaquah’s center is at 5415 220th Ave. S.E.